Malicious PDF — malware analysis report

Static analysis result for SHA-256 11401cf9860ed40b…

MALICIOUS

PDF

36.9 KB Created: 2021-07-04 16:17:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: f2c76cda2372b030322298f68bc99329 SHA-1: d8630bbbb136610c9e00e20adc8396c08f882f42 SHA-256: 11401cf9860ed40b8f7bb3c2c647d6716f89ddf61493db8aaf947ab8e28f8662
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are SEO-optimized and point to game-related hacks and free currency. The ML classifier strongly indicates maliciousness, and the presence of a 'download button' heuristic suggests a lure for users to click these links. The document likely serves as a landing page to redirect users to malicious sites for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/406889139/coin-master-claim-free-spins-game-hack PDF link annotation
    • http://e-learning.man2-oki.sch.id/__statics/gudangsoal/files/hack-impact-roblox_GM431946152.pdfIn PDF document text
    • http://e-learning.man2-oki.sch.id/__statics/gudangsoal/files/free-cards-to-use-to-buy-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.man2-oki.sch.id/__statics/gudangsoal/files/cheat-code-for-camera-recorder-in-slender-reborn-roblox_GM431946152.pdfIn PDF document text
    • http://e-learning.man2-oki.sch.id/__statics/gudangsoal/files/free-t-shirt-deacls-roblox_GM431946152.pdfIn PDF document text
    • http://e-learning.man2-oki.sch.id/__statics/gudangsoal/files/roblox-jailbreak-hack-download-money_GM431946152.pdfIn PDF document text
    • http://e-learning.man2-oki.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-accounts-2021-august_GM431946152.pdfIn PDF document text
    • http://e-learning.man2-oki.sch.id/__statics/gudangsoal/files/free-ll-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.man2-oki.sch.id/__statics/gudangsoal/files/hack-dragon-ball-z-roblox_GM431946152.pdfIn PDF document text
    • http://e-learning.man2-oki.sch.id/__statics/gudangsoal/files/roblox-one-piece-treasure-hack_GM431946152.pdfIn PDF document text
    • http://e-learning.man2-oki.sch.id/__statics/gudangsoal/files/minecraft-free-online_GM479516143.pdfIn PDF document text
    • http://e-learning.man2-oki.sch.id/__statics/gudangsoal/files/how-to-hack-roblox-with-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://e-learning.man2-oki.sch.id/__statics/gudangsoal/files/new-cheat-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://e-learning.man2-oki.sch.id/__statics/gudangsoal/files/freemobile-360info-free-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.man2-oki.sch.id/__statics/gudangsoal/files/working-hacks-for-getting-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://e-learning.man2-oki.sch.id/__statics/gudangsoal/files/roblox-magnet-simulator-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://e-learning.man2-oki.sch.id/__statics/gudangsoal/files/roblox-the-free-prize-giveaway-obby_GM431946152.pdfIn PDF document text
    • http://e-learning.man2-oki.sch.id/__statics/gudangsoal/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://e-learning.man2-oki.sch.id/__statics/gudangsoal/files/how-to-hack-in-to-roblox-easy-to-learn_GM431946152.pdfIn PDF document text
    • http://e-learning.man2-oki.sch.id/__statics/gudangsoal/files/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://e-learning.man2-oki.sch.id/__statics/gudangsoal/files/epic-game-free-liggiy-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003793.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3793 23640 bytes
SHA-256: 4b8bbadaa8163d1c7d7c4b1397ecdaf4f17d2e74190f905f991e822c104b0b67
font_01_sfnt_off00006d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D2C 18508 bytes
SHA-256: 1abd1480299989abb1f48682f677ba61eec9d98677dd9594eb02aefabe69620b

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